<?php

namespace App\Services\Payment;

use App\Models\PaymentGatewayAccount;
use App\Models\PaymentProvider;
use App\Models\PaymentTransaction;
use App\Models\TenantPaymentSetting;
use App\Models\User;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Str;
use Illuminate\Validation\ValidationException;

class PaymentGatewayService
{
    public function providers()
    {
        return PaymentProvider::where('enabled', true)->orderBy('name')->get();
    }

    public function settings(User $actor, ?int $tenantId): array
    {
        $accounts = PaymentGatewayAccount::with('provider:id,code,name,scope,capabilities,credential_schema')
            ->when(! $actor->isMasterAdmin(), fn ($q) => $q->where(fn ($x) => $x->where('tenant_id', $tenantId)->orWhere('scope', 'platform')))
            ->when($actor->isMasterAdmin() && $tenantId, fn ($q) => $q->where(fn ($x) => $x->where('tenant_id', $tenantId)->orWhere('scope', 'platform')))
            ->orderBy('scope')->orderBy('name')->get()
            ->map(fn ($account) => $this->maskedAccount($account));

        $setting = $tenantId ? TenantPaymentSetting::with(['tenantGateway.provider', 'platformGateway.provider'])->firstOrCreate(
            ['tenant_id' => $tenantId],
            ['payment_mode' => 'disabled', 'fee_bearer' => 'customer', 'default_expiry_minutes' => 1440]
        ) : null;

        return compact('accounts', 'setting');
    }

    public function saveAccount(array $data, User $actor, ?int $tenantId, ?PaymentGatewayAccount $account = null): PaymentGatewayAccount
    {
        $scope = $data['scope'];
        if ($scope === 'platform' && ! $actor->isMasterAdmin()) {
            abort(403, 'Hanya Master Admin yang dapat mengelola gateway platform.');
        }
        $effectiveTenant = $scope === 'platform' ? null : ($actor->isMasterAdmin() ? ($data['tenant_id'] ?? $tenantId) : $tenantId);
        if ($scope === 'tenant' && ! $effectiveTenant) {
            throw ValidationException::withMessages(['tenant_id' => 'Tenant wajib dipilih.']);
        }
        if ($account && ($account->scope !== $scope || ($scope === 'tenant' && (int) $account->tenant_id !== (int) $effectiveTenant))) {
            abort(403);
        }

        return DB::transaction(function () use ($data, $account, $scope, $effectiveTenant) {
            if (($data['enabled'] ?? false) && $scope === 'tenant') {
                PaymentGatewayAccount::where('tenant_id', $effectiveTenant)->where('scope', 'tenant')
                    ->when($account, fn ($q) => $q->whereKeyNot($account->id))->update(['enabled' => false, 'is_default' => false]);
            }
            if (($data['is_default'] ?? false) && $scope === 'platform') {
                PaymentGatewayAccount::where('scope', 'platform')
                    ->when($account, fn ($q) => $q->whereKeyNot($account->id))->update(['is_default' => false]);
            }

            $payload = [
                'uuid' => $account?->uuid ?? Str::uuid(),
                'payment_provider_id' => $data['payment_provider_id'],
                'tenant_id' => $effectiveTenant,
                'scope' => $scope,
                'name' => $data['name'],
                'environment' => $data['environment'],
                'settings' => $data['settings'] ?? [],
                'enabled' => $data['enabled'] ?? false,
                'is_default' => $data['is_default'] ?? false,
            ];
            if (! empty($data['credentials'])) {
                $payload['credentials'] = $data['credentials'];
            }
            if (filled($data['webhook_secret'] ?? null)) {
                $payload['webhook_secret'] = $data['webhook_secret'];
            }

            $model = $account ?: new PaymentGatewayAccount;
            $model->fill($payload)->save();

            return $model->load('provider');
        });
    }

    public function saveTenantSetting(array $data, User $actor, ?int $tenantId): TenantPaymentSetting
    {
        $effectiveTenant = $actor->isMasterAdmin() ? ($data['tenant_id'] ?? $tenantId) : $tenantId;
        if (! $effectiveTenant) {
            throw ValidationException::withMessages(['tenant_id' => 'Tenant wajib dipilih.']);
        }

        if ($data['payment_mode'] === 'tenant_gateway') {
            $valid = PaymentGatewayAccount::whereKey($data['tenant_gateway_account_id'] ?? 0)
                ->where('tenant_id', $effectiveTenant)->where('scope', 'tenant')->where('enabled', true)->exists();
            if (! $valid) {
                throw ValidationException::withMessages(['tenant_gateway_account_id' => 'Gateway tenant aktif tidak valid.']);
            }
        }
        if ($data['payment_mode'] === 'platform_gateway') {
            $valid = PaymentGatewayAccount::whereKey($data['platform_gateway_account_id'] ?? 0)
                ->whereNull('tenant_id')->where('scope', 'platform')->where('enabled', true)->exists();
            if (! $valid) {
                throw ValidationException::withMessages(['platform_gateway_account_id' => 'Gateway platform aktif tidak valid.']);
            }
        }

        return TenantPaymentSetting::updateOrCreate(['tenant_id' => $effectiveTenant], [
            ...$data,
            'tenant_id' => $effectiveTenant,
            'tenant_gateway_account_id' => $data['payment_mode'] === 'tenant_gateway' ? $data['tenant_gateway_account_id'] : null,
            'platform_gateway_account_id' => $data['payment_mode'] === 'platform_gateway' ? $data['platform_gateway_account_id'] : null,
        ])->load(['tenantGateway.provider', 'platformGateway.provider']);
    }

    public function transactions(array $filters, User $actor, ?int $tenantId)
    {
        return PaymentTransaction::with(['tenant:id,tenant_name', 'user:id,name', 'customer:id,name,customer_code', 'invoice:id,invoice_number', 'account.provider:id,code,name'])
            ->when(! $actor->isMasterAdmin(), fn ($q) => $q->where('tenant_id', $tenantId))
            ->when($actor->isMasterAdmin() && $tenantId, fn ($q) => $q->where('tenant_id', $tenantId))
            ->when($filters['search'] ?? null, fn ($q, $search) => $q->where(fn ($x) => $x->where('transaction_number', 'ilike', "%{$search}%")->orWhere('provider_reference', 'ilike', "%{$search}%")))
            ->when($filters['status'] ?? null, fn ($q, $value) => $q->where('status', $value))
            ->when($filters['provider_code'] ?? null, fn ($q, $value) => $q->where('provider_code', $value))
            ->when($filters['purpose'] ?? null, fn ($q, $value) => $q->where('purpose', $value))
            ->when($filters['date_from'] ?? null, fn ($q, $value) => $q->whereDate('created_at', '>=', $value))
            ->when($filters['date_to'] ?? null, fn ($q, $value) => $q->whereDate('created_at', '<=', $value))
            ->orderBy($filters['sort_by'] ?? 'id', $filters['sort_direction'] ?? 'desc')
            ->paginate($filters['per_page'] ?? 10);
    }

    private function maskedAccount(PaymentGatewayAccount $account): PaymentGatewayAccount
    {
        $account->setAttribute('has_credentials', ! empty($account->getRawOriginal('credentials')));
        $account->setAttribute('has_webhook_secret', ! empty($account->getRawOriginal('webhook_secret')));

        return $account;
    }
}